I have made 2 quilts and a table runner with the Quick Curve ruler. There is a slot in the ruler just above the words on the ruler. I made the one that looks like a DWR and the urban 9 patch. I did have to read the directions a couple of time to wrap my head around how to trim the blocks. The curves are pretty easy to sew once you make a couple I did find that the best rotary cutter to use on the curve was a 28 MM one. The larger cutter didn't work as easily in the slot. Their patterns are beautiful.